Primitive arthropods, Biology

Assignment Help:

Primitive Arthropods

The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of the presence of rows of papillae on them. Each leg consists of two parts, a conical proximal part along with their extrinsic muscles, and a small distal part comprising a pair of claws.

183_Primitive Arthropods.png

Figure: Peripatus lateral view of head

The limbs are protracted and retracted. Using these legs, and through extension and contraction of the body for working the legs they crawl. While a segment is extended, the legs are lifted and moved forward; subsequent effective stroke provides the animals a pushing force.


Related Discussions:- Primitive arthropods

By which mechanisms pathogenic bacteria cause diseases, Q. What are few me...

Q. What are few mechanisms by which pathogenic bacteria cause diseases? And why is this knowledge important? Pathogenic bacteria have characteristics called as virulence factor

Zoology, give the discriptive account of nerilla which belongs to class a...

give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida

What is the classification that divides orders, What is the classification ...

What is the classification that divides orders? Orders are divided into Families. The hierarchy of classification of living things most usually used is, from broadest to nar

How the arrangement of cells helps with tissue functioning, PROVIDE a speci...

PROVIDE a specific example for epithelial and connective tissues, how the arrangement of cells helps with tissue functioning?

Polarity do water-soluble and fat-soluble substances, Q. Which type of pola...

Q. Which type of polarity do water-soluble and fat-soluble substances respectively have? Water-soluble substances are polar molecules that are they have electrically charged ar

Polyembryony, Polyembryony Presence of more than one embryo in a seed...

Polyembryony Presence of more than one embryo in a seed is termed polyembryony. The phenomenon, first discovered in orange seeds by Leeuwenhoek (1719), attracted considerable

Describe pulsus parvus et tardus, Describe pulsus parvus et tardus? Pu...

Describe pulsus parvus et tardus? Pulsus parvus et tardus means a slow rising small volume pulse typically in severe aortic stenosis with preserved LV function. Figur

Explain about iceberg phenomenon, Q. Explain about Iceberg Phenomenon? ...

Q. Explain about Iceberg Phenomenon? Phenomenon means a fact or occurrence that appears. Let us see how iceberg phenomenon is applied to Diabetes Mellitus (DM). Cases of dia

Explain adefovir dipivoxil, Adefovir dipivoxil (Hepsera)  This phosphon...

Adefovir dipivoxil (Hepsera)  This phosphonate nucleoside analog, administered as the oral prodrug, inhibits replication of HBV, including variants resistant to lamivudine. Ade

Explain the energy flow of ecology, Explain the energy flow of ecology? ...

Explain the energy flow of ecology? Energy flow: As you can see, energy flow is one way in an ecosystem. Energy is not recycled. The ultimate source of energy that powers eco

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd